Tonight at 19:50 UTC a magnitude 3,9 earthquake took place in Krýsuvík volcano. This earthquake is not volcano related, this is a tectonic earthquake and has started a minor earthquake swarm in Krýsuvík area. Other earthquakes so far have been small, with largest aftershock having the magnitude of 1,6. The magnitude 3,9 earthquake was felt in Hafnarfjörður and in the Reykjavík area (and nearby towns).
This earthquake swarm is currently ongoing, but it doesn’t appear to be a strong or a highly active earthquake swarm at the moment. It’s unclear if that is going to change since it’s impossible to predict how this earthquake swarms behave.